Thanks, PP for explaining my point in perhaps better language. I would suggest mavie to review my answer to this question, for I already explained that instead of "correcting" the idea that Jesus was "making himself equal to God," the author is actually affirming this claim. Don't get hung up on the statement about the Son being unable to do anything of his own accord. The purpose of this statement is not to emphasize Jesus' inferiority but to highlight his authority as God's appointed agent. He goes on to explain that God has authorized him to do everything he himself can do. This emphasizes parity with God, not the opposite. Read again the statements I cited: "Whatever the Father does the Son does too" (v. 19), "As the Father gives life to anyone he chooses, so the Son gives life to anyone he chooses" (v. 20-21), "All may honor the Son as they honor the Father" (v. 22-23), "the Father who is the source of life has made the Son the source of life" (v. 25-26), etc. All these statements emphasize the equality of the Son with the Father as it pertains to "doing whatever the Father does", in "giving life to anyone he chooses," which is exactly what Jesus was doing on the Sabbath. So, indeed, by doing these things "he was making himself God's equal"; nothing less than God's equal has the power and ability to do whatever the Father does. It's a status given to the Son by the Father, true, but the mere fact that it is a conferred status does not negate the status itself.
The claim that Jesus is 'divine in nature' can have many different meanings. Is he (a) God? John 1:1 seems to point the reader in that direction. However, Satan is also called a God in the Bible. What does this mean? Could it be that both have the same nature as God? Could they both be spirits?
No, Satan is not referred to as theos in the same way Jesus is in John 1:1. Satan is referred to as the "god of this world" for unbelievers (apistón) in 2 Corinthians 4:4; he is their "god" because he has "blinded their mental powers". Clearly, his status as theos is a fictive one, through deception, and not comparable in any way to God himself. Thus Paul states elsewhere: "For even if there are so-called gods (legomenoi theoi), whether in heaven or on earth, as indeed there are many "gods" and many "lords", yet for us there is but one God, the Father, from whom all things came and for whom we live" (1 Corinthians 8:5-6). The situation in John 1:1 is altogether different. As I noted in my first post to this thread, the Logos is not characterized as an inferior theos or even a pseudo-theos as Satan is in 2 Corinthians, i.e. "divine" but less divine than God. The qualitative construction is the same one used in 1 John 4:8 that states that "God is love". God is love in a similar way that the Logos is God. The idea is that everything love is, God is. The idea is not that God represents a lesser kind of love. Similarly, in John 1:1 the Logos is whatever God is. He is not being identified as the God he was "with"; rather, his nature is defined as corresponding to that of God. Everything God is, the Logos is. So you can capture the sense by saying "The Logos was divine" or "the Logos was divine in nature," as long as you understand that this nature is not less divine than God himself. This accords very well with the sense in ch. 5, "Whatever the Father does, the Son does as well", "The Father gives life as the Son gives life," "the Son is honored as the Father is honored", etc. The Logos can reveal the Father precisely because he has all the power, divinity, and authority that the Father has. That is why Jesus could say "He who has seen me has seen the Father" (John 14:9).